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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 20, 2011. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 1273 | S18 | W26 | 02 | 0010 | Alpha | Aug 19, 2011 | Aug 26, 2011 | Sep 8, 2011 |
| № 1272 | S21 | E29 | 02 | 0030 | Alpha | Aug 23, 2011 | Aug 30, 2011 | Sep 13, 2011 |
| № 1271 | N16 | E27 | 12 | 0240 | Beta-Gamma | Aug 23, 2011 | Aug 30, 2011 | Sep 12, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to August 2011. The gray background is the average SSN index.
